Packaging



July 10, 1934. N. KRAFT 1,965,769

1 5 PACKAGING Original Filed May '11, 1929 Patented July 10, 1934 PACKAGING Norman Kraft, assignments,

Wilmette, 111., assignor, by memo to Kraft-Phenix Cheese Corporation, a corporation of Delaware Application May 11, 1929, Serial No. 362,162

Renewed April 1, 1932 Claims. (Cl. 229-14) This invention relates particularly to packages like, which are apt to defor food' stuffs or the teriorate when exposed to the air.

The principal objects I provide a package structure especially adapted an impervious wrapper on while in a liquid or soft plastic state, are poured or deposited in the package; to provide an improved package structure which will effectively preserve the contents of the packtime; and to provide a simple and efficient package structure which forming, filling and closing by to the formation of products which,

age over long periods of adapts itself to automatic means. 15,

specification and accompanying In the drawing:

closing thereof.

Fig. 4 is a plan of a blank of sheet material which forms a lining in my improved package.

Referring now more particularly to Figs. 1, 2 and 3, my improved package comprises an outgr as board or the like, the same being folded and fastened in any approved manner to form a substantially rectangular outer receptacle including top flap member 18, a lip 19 which is adapted to be tucked inside of the front side wall 20 of the receptacle, The outer receptacle 15 is provided with a liner, preferably of impervious sheet material such as metal foil, which is proreceptacle 15 formed of a suitable grade of p end fiaps 16 and 17 and a the latter being provided with vided in blank form as shown in Fig. 4.

The blanks, as shown stantially rectangular main body fitting inside of cipally along the broken. lines as to form a bottom liner ner portions 27 may of the invention are to Other objects and advantages of my invention will be understood by reference to the following drawing wherein I have illustrated my improved form of package.

Figs. 1, 2 and 3 are perspective views of my imin Fig. 4, comprise sub-' portions 21 which are adapted to be folded into receptacles the outer containers 15 so as to line the bottom and side walls of the latter. The rectangular main body portion-21 is folded prinshown in Fig. 4, so portion 22, front and back wall liner portions 23 and 24 respectively, and end wall liner portions 25 and 26. The corconveniently be rounded as shown, and these parts are folded over the reand 26 in a well known to the formation of the the main body part 21 thus formed of lining material, For closing the open top of the receptacle, I provide front and rear wall flaps 28 and 29 respectively. and end wall flaps 30 and 31 respectively, which flaps project or extend from. and beyond the edges of the mainbody part of the lining sheet blank.

These flaps are adapted to be folded over substantially as shown in Figs. 1 and 2.

Mechanism well known in the art may be provided for forming the outer receptacle 15' and also for inserting the liner therein, the end flaps and top member. f the outer receptacle being in the upwardly projected positions shown in Fig. 1. The flap parts of the lining sheet will also project upwardly from the respective walls of the lining material receptacle, the back wall flap 29 and end wall flaps 30 and 31 being substantially as shown in Fig. 1. The front wall'fiap'28 would initially extend upwardly in substantially the position shown in dotted lines in Fig. 1. The lined receptacle is thus completely formed except that the top thereof is not closed. 7

I have found it convenient toassociate the receptacle forming mechanism with suitable conveyors for receiving and conveying the empty receptacles into register with a discharge spout or the like of a hopper or other material supply container from which discharge spout the empty receptacles may be filled with the food stuff or other material which it is desired to package. My improved package has been found to be exceptionally well suited to the packaging of such food stuffs as cheese or cheese products, which are apt to deteriorate when exposed to the air.

After the lined receptacle is filled with the desired material, the package may be closed, by first bending or folding the front wall fiap 28 inwardly over the top of the contents of the package substantially to the position shown in full lines in Fig. 1. The length of the flap 28, is preferably somewhat greater than the corresponding dimension across the top of the package so that a marginal portion 28a of the front flap 28 will be folded upwardly adjacent the rear wall fiap 29, as clearly shown in full lines in Figs. 1 and 2. The end wall flaps 16 and 1'7 of the outer re- 1 ceptacle may then be folded inwardly over the top of the contents of the receptacle, 1. e. over the flap 28 of the liner, the end wall flaps 30 and 31 of the l'ner being incidentally folded inwardly over marginal end portions of the top of the receptacle contents as shown in Fig. 2. After the flaps 16 and 1'. are so folded, the top member 18 of the outer receptacle may be folded to complete the closing of the receptacle, the flap portions 28a and 29 of the liner being incidentally folded 110 package contents.

For facilitating the formation of a substantially impervious inner enclosure for the package contents, I cut away the end flaps 16 and 1'7 of the outer receptacle as clearly shown in Figs. -1 and 2 so that the flap portions 28a and 29 of the liner may be folded to closed positionin direct contact with the upper surface of the flap parts 28, 30 and 31. It being understood that the material from which the inner or lining receptacle is formed, is of comparatively thin and flexible material, it will be seen that the above described fiap arrangement will effectively seal the top of the inner receptacle so that the contents of the package are protected from the deteriorating effects of the air. It is, of course, noted that there are no parts of the outer, pasteboard receptacle 15 interposed between the flap parts of the lining material receptacle, and that air leaks, which often are present in the usual package structure due to such interposed parts, are not apt tobe found in packages made according to the present invention. Also, by reason of the absence of folds in the cover of the inner receptacle, leaks are .less likely to occur.

It should be observed that when the package content is in a more or less liquid or soft plastic state, pressure may not be applied to the top of the package to close the flaps or folds of the top cover of the cording to the The arrangement herein described eliminates all necessity for such pressure since there are no folds within the top area which require compression to effect tight closing of the respective overlapping cover parts. It is only necessary to gently fold the respective cover flaps downwardly into contact with the soft package content inner receptacle when made acwhich thereupon adheres to the flaps to holdthem in tight, air-excluding contact with said content. It will further be understood that the absence of folds in the top covering portions of the inner receptacle make it possible to press the flaps into such air-excluding contact with firm package contents with considerably less pressure than is required when such folds are present.

I am aware that changes may be made in the form, construction and arrangement which I have above described-without departing from the spirit of my invention, the scope of which should be determined by reference to the following claims, the same being construed as broadlyas possible consistent with the state of the art.

I claim as my invention:

1. In a substantially rectangular package of the class described, a wrapper of impervious sheet material comprising a substantially rectangular main body portion adapted to be folded to cover thebottom and sides of the package content, and flaps extending from and beyond oppositely disposed edges of said main body portion, said flaps being each adapted to be folded over a portion of the top of said contents, three of said flaps being of sufficient length to cover only marginal portions of said top and the other flap being of sufiicient length to cover the whole of said top and to be rebent over the top in unison with the oppositely disposed shorter flap.

2. In a substantially rectangular package of the class described, a wrapper of impervious sheet material comprising a substantially rectangular main body portion adapted to be folded to cover the bottom and sides of the package content, flaps the bottom and sides of the package content, and

heretofore conventional practice.-

- 1,965,769 as the marginal side portions of the top of the extending from and beyond oppositely disposed edges of said main body portion, said flaps being each adapted to be folded over a portion of the top of said contents, three of said flaps being of sufficient length to cover only marginal portions of said top and the other i'lap being of sufficient length to substantially cover the whole of said top, and an outer protective covering for said wrapper comprising a receptacle including bottom and side walls, end flaps adapted to be folded inwardly over the top of said contents, and a top member adapted to be folded inwardly over said end flaps, said end flaps being cut away to permit said top member and one of said shorter inner wrapper flaps to be folded over the top of said contents subsequent to the folding of said end flaps without overlapping said shorter flap over said end flaps, thereby facilitating the formation of a substantially impervious inner enclosure for said contents.

3. In a substantially rectangular package of the class described, a wrapper of impervious sheet material comprising a substantially rectangularmain body portion adapted to be folded to cover flaps extending from and beyond oppositely disposed edges of said main body portion, said flaps being each adapted to be folded over a portion of the top of said contents, three of said flaps being of suflicient length to cover only marginal portions of said top and the other flap being of sufficient length to cover the whole of said top and to be rebent over the top in unison with the oppositely disposed shorter flap, an outer protective covering for said wrapper comprising a receptacle including bottom and side walls, end flaps adapted to be folded inwardly over the top of said contents; and a top member adapted to be folded inwardly over said end flaps, said end flaps being cut away to permit said top member to be folded over said end flaps and thereby incidentally to effect folding and rebending of said inner wrapper flaps in unison, subsequent to the folding of said end flaps without overlapping said inner wrapper flaps over said end flaps, thereby facilitating the formation of a substantially impervious inner enclosure for said contents.

4. A package of the class described, comprising an outer receptacle having end flaps and a top member adapted to be folded over the top of said receptacle to close the same, and a liner of impervious sheet material in said receptacle, said liner being provided with flaps extending from the side wall portions of the liner and adapted to be folded into relatively overlapping relation over the top of the package contents to form a substantially impervious inner enclosure therefor, the arrangement being such that some of said liner flaps are adapted to be folded as an incident to the folding of said receptacle flaps and top member and also such that said top member is adapted to be folded over subsequent to the folding of said end flaps, said end flaps being cut away to permit the liner flap which is folded over as an incident to the folding of said top member, to be folded into closed position without overlapping said receptacle and flaps.

5. In a substantially rectangular package of the class described, a wrapper of impervious sheet material comprising a main body portion adapted to be folded to cover the bottom and sides of the package content, top flaps projecting from certain of the side covering portions of said wrapper, said flaps being eachadapted to be folded over a portion'of the top of said contents, and an outer when folded, to incidentally fold one of said inner wrapper flaps, snugly around the adjacent top corner of the package content, thereby facilitating the formation of a substantially impervious inner enclosure for said content.

NORMAN KRAFT. 

